internal override bool Delete(ScriptValue property)
{
//https://tc39.github.io/ecma262/#sec-arguments-exotic-objects-delete-p
var isMapped = ParameterMap.HasOwnProperty(property);
var result = base.Delete(property);
if (result && isMapped)
{
ParameterMap.Delete(property);
}
return(result);
}
internal override bool DefineOwnProperty(ScriptValue property, PropertyDescriptor descriptor)
{
//https://tc39.github.io/ecma262/#sec-arguments-exotic-objects-defineownproperty-p-desc
var isMapped = ParameterMap.HasOwnProperty(property);
var newArgumentDescriptor = descriptor;
if (isMapped && descriptor.IsDataDescriptor)
{
if (!descriptor.Value.HasValue && descriptor.Writable.HasValue && !descriptor.Writable)
{
newArgumentDescriptor = new PropertyDescriptor(ParameterMap.Get(property), descriptor.Writable, descriptor.Enumerable, descriptor.Configurable);
}
}
var allowed = base.DefineOwnProperty(property, newArgumentDescriptor);
if (!allowed)
{
return(false);
}
if (isMapped)
{
if (descriptor.IsAccessorDescriptor)
{
ParameterMap.Delete(property);
}
else
{
if (descriptor.Value.HasValue)
{
var setStatus = Agent.Set(ParameterMap, property, descriptor.Value.Value, false);
Debug.Assert(setStatus);
}
if (descriptor.Writable.HasValue && !descriptor.Writable)
{
ParameterMap.Delete(property);
}
}
}
return(true);
}
